2. Location
Upper and left part of abdomen
Epigastric, umbilical and left
hypochondrial region
3. Stomach
In adult life, stomach located T10 and
L3 vertebral segment
Can be divided into anatomic regions
based on external landmarks
4 regions
Cardia
Fundus
Corpus (body)
Antrum
6. Anatomy
Corpus- region
between fundus and
antrum
Margin not distinctly
external, has arbitrary
borders
Antrum- bounded
distally by the
pylorus
Which can be
appreciated by
palpation of a
thickened ring of
smooth muscle
7. shape
Depends on degree of distension and
surrounding viscera
Empty - J shape
Partly distended - piriform
Obese - horizontal - steer horn
stomach
8. size
Distensible
10 in. long
Capacity
30 ml - birth
1 l - puberty
1 ½ l – 2 l or more - adult
9. External features
Cardiac orfice -7th costal cartilage, T 11
vertebra
Pyloric orifice - lowerborder of L 1
Pyloric constriction - circular groove
Pylorus = gate guard
PrePyloric vein in front of constriction
Lesser curvature, lesser omentum, incisura
angularis
16. Vasculature
Well vascularized organ
Arterial flow mainly derived from
Celiac Artery
3 Branches
Left Gastric Artery
Supplies the cardia of the
stomach and distal esophagus
17. Splenic Artery
Gives rise to 2 branches which
help supply the greater
curvature of the stomach
Left Gastroepiploic
Short Gastric Arteries
18. Common Hepatic or Proper Hepatic
Artery
2 major branches
Right Gastric- supples a
portion of the lesser curvature
Gastroduodenal artery
-Gives rise to Right
Gastroepiploic artery
-helps supply
greater curvature in
conjunction with Left
Gastroepiploic Artery
19. Blood supply
Left gastric artery- br of coeliac trunk
Right gastric artery- br of common
hepatic artery
Right gastro epiploic artery- br of
gastrodoudinal artery
Left gastro epiploic artery- br of
splenic artey
5-7 short gastric arteries -br of
splenic artery
23. Venous drainage
• Right & left gastric veins -> hepatic
portal vein.
Left gastroepiploic & short gastric
veins -> hepatic portal vein via the
splenic vein.
Right gastroepiploic vein join superior
mesenteric vein.
25. Lymphatic drainage
Area A pancreatosplenic
Area B left gastric
Area C right gastroepiploic sub pyloric
hepatic
Area D diff directions into pyloric,
hepatic, left gastric
Coeliac trunk cisterna chyli
27. Anatomy
Lymphatic drainage
Lymph from the proximal portion of the
stomach drains along the lesser curvature first
drains into superior gastric lymph nodes
surrounding the Left Gastric Artery
Distal portion of lesser curvature drains
through the suprapyloric nodes
Proximal portion of the greater curvature is
supplied by the lymphatic vessels that traverse
the pancreaticosplenic nodes
Antral portion of the greater curvature drains
into the subpyloric and omental nodal groups
28. Anatomy
Nerve Supply
Left and Right Vagus Nerves descend
parallel to the esophagus within the
thorax before forming a peri-esophageal
plexus between the tracheal bifurcation
and the diaphragm
From this plexus, two vagal trunks
coalesce before passing through the
esophageal hiatus of the diaphragm
29. Anatomy
Left (anterior)
Vagus Nerve
Left of the
esophagus
Branches
Hepatic Branch
Supplies liver
and Biliary
Tract
Anterior gastric
or Ant. Nerve of
Latarget
30. Anatomy
Right (posterior)
Vagus Nerve
Right of the
esophagus
Branches
Celiac
Posterior
Latarget
Innervates
posterior
gastric wall
31. Anatomy
Parasympathetic innervation of
Stomach- Vagus Nerve
90% of fiber in vagal trunk is afferent
(info transmitting from stomach to CNS)
Sympathetic innervation of Stomach-
Splanchnic Nerve
Derived from spinal segement T5-T10
32. Nerve supply
Sympathetic T5 - T10
Via splanchenic nerves, coeliac and
hepatic pluxes
Vasomotor
Motor to pyloric shincter only
Pain sensation from stomach